Calculate difference in dates

[Frank]

For my website i would like to display the age of my son in years,
months, days and hours.

For now i manage to get a result for totals. Like the total number of
days.

This is the beginning:

starttime = Date.parse("Aug 10,2003, 07:07")
sdt = new Date(starttime)
starttime= Math.ceil((star ttime) / 1000 / 60 / 60 / 24 )
ndt = new Date()

y = sdt.getYear()
m = sdt.getMonth() + 1
d = sdt.getDate()
h = starttime

Thanx

[John G Harris]

In article <U0************ *****@twister.n yroc.rr.com>, Mick White
<mw******@BOGUS rochester.rr.co m> writes

<snip>

If "theHour" is 0, then it is "12" am, no?
Mick

<snip>

Or 12 pm if your reference point is the previous noon instead of the
next noon.

There is also the problem of 12 noon, which is neither before (ante) nor
after (post) noon.

Altogether, the 24 hour clock as the railways call it is a lot easier to
code.

John
--
John Harris

[Lasse Reichstein Nielsen]

Mick White <mw******@BOGUS rochester.rr.co m> writes:

Lasse Reichstein Nielsen wrote:

Then you could also do:
return ((theHour - 1) % 12) + 1;

Yes, you could, but it would be wrong. What if theHour is 0 (zero)?

Arh, bugger. I always forget that %12 can give results that are not
between 0 and 11. May whoever made that decission be forced to watch
Barney for 24 hours a day until he repents!

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
'Faith without judgement merely degrades the spirit divine.'

[Dr John Stockton]

JRS: In article <u0**********@h otpop.com>, dated Tue, 7 Sep 2004
19:19:49, seen in news:comp.lang. javascript, Lasse Reichstein Nielsen
<lr*@hotpop.com > posted :

Mick White <mw******@BOGUS rochester.rr.co m> writes:

function showTheHour (theHour){
return theHour==0?12:t heHour<13?theHo ur:theHour-12;
}

Then you could also do:

return ((theHour - 1) % 12) + 1;

which is shorter, although not necessarily faster :)

Yields 0 1 2 12 1 2 11.

Use ((theHour + 11) % 12) + 1;

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 MIME. ©
Web <URL:http://www.merlyn.demo n.co.uk/> - w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demo n.co.uk/programs/> - see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.

[Dr John Stockton]

JRS: In article <gd************ *************** *****@4ax.com>, dated
Tue, 7 Sep 2004 03:53:05, seen in news:comp.lang. javascript, Otter
<Ot***@nospam.n et> posted :

I've looked high and low for a javascript counter which can break down
to years/month/days since an event happened but I have yet to find
one. I am assuming now that it can't be done otherwise I'm sure I
would have come across one by now. Found lots of unanswered requests
for the same by others.

Counting in Y M D is not all that meaningful, since months (and years,
and days) vary in length.

By using the newsgroup FAQ, you should have found one which counts in
days and hh:mm:ss until Xmas noon (js-date2.htm#RC); you should be able
to modify that to count up.

Likewise, you could have found js-date1.htm#DYMD, which gives the
difference between two dates in Y M D.

Note that, since months differ in length, with two dates D1 D2, the YMD
that D2 is after D1 does not necessarily match the YMD that D1 is before
D2, on reasonable definitions.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 IE 4 ©
<URL:http://www.jibbering.c om/faq/> JL/RC: FAQ of news:comp.lang. javascript
<URL:http://www.merlyn.demo n.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.

[Mick White]

Dr John Stockton wrote:

Yields 0 1 2 12 1 2 11.

Use ((theHour + 11) % 12) + 1;

24:00 hrs?
Mick

[Dr John Stockton]

JRS: In article <5L************ *******@twister .nyroc.rr.com>, dated
Tue, 7 Sep 2004 22:37:53, seen in news:comp.lang. javascript, Mick White
<mw******@BOGUS rochester.rr.co m> posted :

Dr John Stockton wrote:

Yields 0 1 2 12 1 2 11.

Use ((theHour + 11) % 12) + 1;

24:00 hrs?

I think I could answer your question, if only I knew what it meant.

In context, theHour is a getHours value, hence an integer in 0..23.

<URL:http://www.merlyn.demo n.co.uk/js-date9.htm#1224> .

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 MIME. ©
Web <URL:http://www.merlyn.demo n.co.uk/> - w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demo n.co.uk/programs/> - see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.

[Mick White]

Dr John Stockton wrote:

JRS: In article <5L************ *******@twister .nyroc.rr.com>, dated
Tue, 7 Sep 2004 22:37:53, seen in news:comp.lang. javascript, Mick White
<mw******@BOGUS rochester.rr.co m> posted :

Dr John Stockton wrote:

Yields 0 1 2 12 1 2 11.

Use ((theHour + 11) % 12) + 1;

24:00 hrs?

I think I could answer your question, if only I knew what it meant.

In context, theHour is a getHours value, hence an integer in 0..23.

<URL:http://www.merlyn.demo n.co.uk/js-date9.htm#1224> .

OK, but I have seen "24:00" hours.
Mick